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Patent Searching and Data


Title:
CAMERA PROVIDED WITH TRIPLET LENS
Document Type and Number:
Japanese Patent JPH0868935
Kind Code:
A
Abstract:

PURPOSE: To obtain a camera provided with a compact triplet type photographing lens.

CONSTITUTION: This is the camera loading a triplet lens for photographing 1 constituted of a first positive refractive-power lens, a second negative- refractive power lens and a third positive refractive-power lens in turn from an object side and provided with a diaphragm 2 arranged backward and using a 35mm roll film or a 24mm roll film. When P is defined as a Petzval's sum and D is defined as the diagonal length of a photographic picture frame, the condition of 0.41≤P.D=≤0.98 is satisfied. The longitudinal direction of the photographic picture frame is bent (3a) toward the object side. In this case, P shows the Petzval's sum of the triplet lens and D shows the diagonal length of the photographic picture frame.


Inventors:
OTA KOHEI
Application Number:
JP8343995A
Publication Date:
March 12, 1996
Filing Date:
March 16, 1995
Export Citation:
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Assignee:
KONISHIROKU PHOTO IND
International Classes:
G02B9/16; G02B9/14; G02B13/18; (IPC1-7): G02B9/16; G02B13/18
Attorney, Agent or Firm:
Fumio Sato (2 others)